Wow - what a sad story on Christmas day! I applaud you for sharing this and trying to help others.
Others have already said the best advice to fetch the car and you have agreed. I sure hope it happens soon and you get back what is rightfully yours.
The world is full of scumbags and you found one. I found one too - but it was on building my house, not my car! So lots of $$'s involved for sure. Guy had been in business for 40 years and had a great reputation. HAD is the key word there. So don't think you are alone or did anything stupid in finding a dirt bag.
When I had my 71 Demon body/paint done, I was fortunate to find a great shop who not only did outstanding work, but did it when they said they would. And encouraged me to drop by anytime to see it in process. I got a bill every 1-2 months for work completed and paid them promptly. An overall very positive experience although I did end up spending way more than planned (I'll bet others can relate). But in the end, I got a superior job done and remain excellent friends with many of the employees and owner.
I sure hope all this works out for you soon and in your favor!